1 inch Black Iron Union Female x Female

1" Black Iron Union – Engineered for Secure, High-Pressure Connections

The 1" Black Iron Union is a threaded fitting designed for disassembling and reconnecting piping systems with minimal effort. It is ideal for applications involving gas, steam, or water where system access or future modifications may be required. Constructed from durable black malleable iron, this union provides mechanical strength and corrosion resistance for demanding environments.

Performance Features

• ✅ Malleable Iron Body – Manufactured from ASTM A197 black iron for consistent mechanical properties and long service life.
• ✅ Threaded Design – NPT female ends with a central union nut allow for easy disconnection and reassembly without pipe rotation.
• ✅ High Pressure Rated – Suitable for working pressures in steam, air, gas, and water lines (up to 300 PSI for water/oil/gas services).
• ✅ Three-Piece Construction – Includes male and female ends plus a coupling nut for precise alignment and a tight seal.
• ✅ Versatile Use – Frequently installed in natural gas piping, HVAC systems, boiler lines, and fire sprinkler systems.

Technical Specifications

• Material: Black Malleable Iron (ASTM A197)
• Size: 1 inch nominal
• Connection Type: NPT Female x Female
• Pressure Rating: 300 PSI (WOG)
• Conformance: Meets ANSI B16.3 and B16.39 standards

Application Notes

This fitting is typically used where piping systems require serviceability or future expansion. It is especially valuable in installations where pipe movement is restricted, as the union allows for easy disconnection without disturbing adjacent sections.

Installation Considerations

Apply pipe thread sealant or PTFE tape to male threads during installation. Tighten connections to ensure a secure, leak-resistant seal, and verify alignment of mating parts before torquing the union nut. Proper installation helps maintain system integrity under pressure and vibration.

Compliance Reminder

Always verify that black iron fittings used in fuel gas systems comply with local mechanical and plumbing codes. Black malleable fittings are not suitable for potable water systems without proper lining.

The 1" Black Iron Union is a reliable, code-compliant fitting tailored for critical infrastructure in commercial and residential plumbing. Its durable build and field-serviceable design make it a preferred solution for high-integrity piping connections that demand repeat accessibility and performance under pressure.